Amazon.com: First Alert CO250 BRK RVA RV Approved CO Alarm : Automotive
BRK Electronics First Alert CO600B 120V AC Plug-in Electrochemical Carbon Monoxide (CO) Alarm
First Alert Brk Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com